PAA NATURAL GAS STORAGE LP

Q: Sep 30 2013

Q: Jun 30 2013

Q: Mar 31 2013

FY: Dec 31 2012

Q: Sep 30 2012

Q: Jun 30 2012

Q: Mar 31 2012

FY: Dec 31 2011

Q: Sep 30 2011

Q: Jun 30 2011

Q: Mar 31 2011

FY: Dec 31 2010

Q: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

2.01,3.01,3.03,5.02,5.07,7.01,8.01,9.01

3.01

2.02,9.01

1.01,7.01,9.01

8.01,9.01

2.02,7.01,9.01

7.01

2.02,7.01,9.01

1.01,9.01

5.02

2.02,7.01,9.01

2.02,7.01,9.01

Regulation FD Disclosure

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

1.01,2.03,9.01

7.01

7.01

2.02,7.01,9.01

7.01

Certification of termination of registration of a class of securities (Section 12(b)) (amendment)

Notice of Effectiveness

Certification of termination of registration of a class of securities (Section 12(b))

Post-effective amendment to a registration statement

Notification of removal from listing and/or registration on a national securities exchange

Withdrawal of a registration statement

Post-effective amendment to a registration statement

Post Effective Amendment to S-8

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Notice of Effectiveness

Prospectus Supplement for Delayed or Continuous Offering

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 (amendment)

No description available

JANUS CAPITAL MANAGEMENT LLC

SMITH ARTHUR L

Burk Victor

none

ARMSTRONG GREG L

O'Shea Donald C

McGee Richard K.

Liollio Dean

Swanson Al

PEFANIS HARRY N

SHACKOULS BOBBY S

none

none

SMITH ARTHUR L

Burk Victor

SHACKOULS BOBBY S

Liollio Dean

O'Shea Donald C

JANUS CAPITAL MANAGEMENT LLC

Burk Victor

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

No description available

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC